The spacious, high-ceilinged rooms on the second floor were used for ceremonial events. Sessions of the sejm and senate, royal audiences, and wedding receptions and balls were held in these grand rooms. Following a catastrophic fire in 1595, the east and north wings of the Renaissance residence built by the Jagiellons were renovated in the early Baroque style by architect Giovanni Trevano for King Sigismund III. Consequently, this part of the castle has Baroque furnishings.